Originally posted by eagle7312 I have the Sigma 10-20 mm. It is a good lens and does not have the fisheye distortion at 10 mm.
ofcourse it doesnt, its a rectilinear lens
to the OP
the Pentax 10-17 Fish Eye lens has the most reach you can squeeze on to a Pentax
the fish eye distortion properties are what allow it to achieve this.
the sigma 10-20 at 10mm will cover less ground because it is a rectilinear lens, however it will not have concave distortions on the edges, but it does stretch the image from the center outward.
different tools for different things.